Thank you all! I love hearing as many versions as I can get my hands on -- ears, rather. Pentangle's melody is the only one I heard outside of this site, but it seems substantially different, so it might be worthwhile to add it to Mudcat's "Cruel Sister." I'm fairly new to folk music terminology, since I'm just now developing interest. What is a "burden" in a song?
Jon W.- If you could, I'd love it if you posted the humorous version. Now that I've traumatized a few of my friends with "Cruel Sister," maybe this will give them less nightmares.